the field of medicine that specializes in the study of tumors. oncology. The branch of medicine that deals with the study and treatment of tumors.
Who are they? Millennials are currently aged 20-35, or born between 1980 and the end of 1994 (with some more generous definitions taking in those born up to 2000). They also get called Generation Y, because they follow on from Generation X (born 1965-1979), and other, less flattering names.
Other proposed dates for Millennials: 1  According to Iconoclast, a consumer research firm, the first Millennials were born in 1978. 2  Newsweek magazine reported that the Millennial generation was born between 1977 and 1994.  In separate articles, the New York Times pegged the Millennials at 1976-1990 and 1978-1998.